Improved machine for making wire springs for furniture



UNITED STATES PATENT OEEICEo CHARLES A. YOUNG AND SOLOMON W. YOUNG, OFyPROVIDENCE, RHODE ISLAND.

`IMPROVED MACHINE FOR MAKING WIRE SPRINGS FOR FURNITURE.

Specification forming part of Letters Patent No. 21,635, dated September28, 1858.

To all whom it may concern:

Be it known that we, CHARLES A. YOUNG and SOLOMON W. YOUNG, ofProvidence, in the county of Providence and State of Rhode Island, haveinvented a new and useful Machine for Making Biconical Wire Springs forFurniture, Src.; and We do hereby declare that the following is a full,clear, and exact description of the construction and operation of thesame, reference being had to the annexed drawings, making a part of thisspecification, in which- Figure l is a front elevation of the machine.Fig. 2 is a side elevation and section through the line A A of Fig. l.Fig. 3 is a plan of the machine, the same letters referring to likeparts in the different figures.

G G is the frame of the machine, of castiron, with a slab, C, of wood oriron, upon the top of the same. Upon the table thus formed are placedand secured, in a proper manner, the uprightjaws F F, of iron, in whichare fitted metallic boxes ff, in which the shafts T T revolve inconnection by the gearsJ J' thereon.

Upon the end of each shaft, at the front of the machine, are secured tworolls, B B, of iron or steel, constructed in the ordinary manner ofrolls for rolling or drawing wire, having a rounded groove sunken ineach to the depth of half the diameter of the wire to be used.

At the right of the rolls B B is the roll D in the end of the lever H.This roll also has a groove formed in its face, but of a greater widthand depth than those of B B. This roll x gives direction to the wire incoiling the same.

The lever H swings upon a pivot, g, and projects downward from thetable. It is slightly curved at the lower end, and has a knife edgeformed thereon, which bears against and is acted upon by theheart-shaped cam L, which, as it revolves with the shaft P, on which itis secured, imparts a vibrating motion to the lever, which causes theroll D to approach and recede from the rolls B B at the proper ltime,for purposes hereinafter explained.

The cam-shaft l? is revolved at a proper relative speed with the rolls BB by means ofthe gear S and the intermediate gears, M and E, on theshaft R, Fig. 2, the latter of which engages with the gear J on theshaft T, which is revolved by means of a belt on the pulley O.

Operation: The end of the wire is passed rod n, and is thus coiled. Theroll D gradually approaches the rolls B B by the action of the cam uponthe lever, thereby lessening the diameter of each coil until theknifeedge has arrived at the pointe of the cam, when the roll D is madeto gradually recede, thus allowing the coils to increase in diameter asthey are formed, until the knifeedge of the lever again arrives at thepoint t' of the cam, when one spring is completed and another commencesto form, and so on, the conical form being imparted by the approachingand receding of the roll D by the action of the heart-shaped cam Lthrough the lever H. This cam can be -applied for this purpose in anumber of forms, differing from each other only in point of convenienceor fitness with respect to the construction of the other parts of themachine. The roll D may be mounted on a carriage moving in or uponguides or ways on the table, and subjected to the action of the heartcamdirectly; or the cam itself may be applied directly in place of the rollD, either method serving to produce a like result; but the method hereindescribed is preferred to others, as being more simple and equally ei'-fective.

What we claim as our invention, and desire to secure by Letters Patent,is-

1. A single grooved roll, D, in combination with the upright rod a, toeffect the coiling of the wire.

2. Varying the diameter of the coils to produce a biconical form in thespring by causing the roll D to approach and recede from theceiling-rolls in a direct or curved line horizontally, substantially asspecied.

CHARLES A. YOUNG. SOLOMON YV. YOUNG.

Witnesses:

- Isaac A. BROWNELL,

HENRY NICKEL.

